Statement Of Financial Position [Abstract]

Admiral Group PLC - Filing #2008813

Concept	As at 2023-12-31	As at 2023-12-31	As at 2023-12-31	As at 2023-12-31	As at 2023-12-31	As at 2023-12-31	As at 2023-12-31	As at 2023-12-31	As at 2023-12-31	As at 2023-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-01-01	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31
Statement of financial position [abstract]
Assets [abstract]
Non-current assets [abstract]
Property, plant and equipment	90,100,000 GBP	—	—	—	—	—	—	—	—	—	89,800,000 GBP	—	—	—	—	—	—	—	—	—	103,200,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Deferred tax assets	46,100,000 GBP	—	—	—	—	—	—	—	—	—	28,400,000 GBP	—	—	—	—	—	—	—	—	—	20,700,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Current assets [abstract]
Cash and cash equivalents	353,100,000 GBP	—	—	—	—	—	—	—	—	—	297,000,000 GBP	—	—	—	—	—	—	—	—	—	372,700,000 GBP	—	—	—	—	—	372,700,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Assets	7,096,200,000 GBP	—	—	—	—	—	—	—	—	—	6,208,800,000 GBP	—	—	—	—	—	—	—	—	—	6,336,700,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Equity and liabilities [abstract]
Equity [abstract]
Issued capital	300,000 GBP	—	—	—	—	—	—	—	—	—	300,000 GBP	—	—	—	—	—	—	—	—	—	300,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Retained earnings	1,018,900,000 GBP	—	—	—	—	—	—	—	—	—	922,600,000 GBP	—	—	—	—	—	—	—	—	—	1,243,500,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Share premium	13,100,000 GBP	—	—	—	—	—	—	—	—	—	13,100,000 GBP	—	—	—	—	—	—	—	—	—	13,100,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Other reserves	40,500,000 GBP	—	—	—	—	—	—	—	—	—	50,200,000 GBP	—	—	—	—	—	—	—	—	—	23,700,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Equity attributable to owners of parent	991,800,000 GBP	—	—	—	—	—	—	—	—	—	885,800,000 GBP	—	—	—	—	—	—	—	—	—	1,280,600,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Non-controlling interests	1,000,000 GBP	—	—	—	—	—	—	—	—	—	1,200,000 GBP	—	—	—	—	—	—	—	—	—	2,300,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Equity	992,800,000 GBP	65,300,000 GBP	1,018,900,000 GBP	1,000,000 GBP	13,100,000 GBP	300,000 GBP	200,000 GBP	991,800,000 GBP	7,500,000 GBP	113,500,000 GBP	887,000,000 GBP	134,500,000 GBP	1,200,000 GBP	13,100,000 GBP	922,600,000 GBP	300,000 GBP	100,000 GBP	885,800,000 GBP	205,900,000 GBP	21,100,000 GBP	1,282,900,000 GBP	1,243,500,000 GBP	3,000,000 GBP	– GBP	1,408,500,000 GBP	20,500,000 GBP	1,282,900,000 GBP	3,000,000 GBP	20,500,000 GBP	13,100,000 GBP	– GBP	– GBP	200,000 GBP	1,348,800,000 GBP	36,700,000 GBP	4,500,000 GBP	1,406,200,000 GBP	300,000 GBP	2,300,000 GBP	105,300,000 GBP	125,600,000 GBP	– GBP	4,300,000 GBP	– GBP	36,700,000 GBP	– GBP	1,280,600,000 GBP	13,100,000 GBP	2,300,000 GBP	125,600,000 GBP	300,000 GBP
Liabilities [abstract]
Liabilities	6,103,400,000 GBP	—	—	—	—	—	—	—	—	—	5,321,800,000 GBP	—	—	—	—	—	—	—	—	—	5,053,800,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Equity and liabilities	7,096,200,000 GBP	—	—	—	—	—	—	—	—	—	6,208,800,000 GBP	—	—	—	—	—	—	—	—	—	6,336,700,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—